CN109449495A - Lithium battery cavity negative pressure formation method and device - Google Patents
Lithium battery cavity negative pressure formation method and device Download PDFInfo
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- CN109449495A CN109449495A CN201811329052.8A CN201811329052A CN109449495A CN 109449495 A CN109449495 A CN 109449495A CN 201811329052 A CN201811329052 A CN 201811329052A CN 109449495 A CN109449495 A CN 109449495A
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- negative pressure
- pallet
- needle plate
- plate component
- seal chamber
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- 238000000034 method Methods 0.000 title claims abstract description 35
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 33
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 239000011261 inert gas Substances 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 18
- 239000000523 sample Substances 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 239000003792 electrolyte Substances 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000011109 contamination Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of lithium battery cavity negative pressure formation method and devices, the described method comprises the following steps: 1) battery core for completing fluid injection being put into inside charge and discharge formation device；2) vacuum valve is opened, starts to extract vacuum 3) carry out formation charging；4) after completing formation charging, vacuum valve is closed, with inert gas breaking vacuum state；5) battery taken out from charging/discharging apparatus to get to it is required by negative pressure be melted into lithium battery；Described device includes including support device, needle plate component, driving cylinder, pallet and control device.The beneficial effects of the present invention are: can guarantee the negative pressure demand of the lithium battery of various forms, without carrying out the contraposition in battery liquid-filling hole, and negative pressure line does not contact directly with battery, batch electrolyte contamination electricity before avoiding.The sealing of cavity is designed using Special seal slot, better tightness, and vacuum effect can be more preferable, reduces negative pressure pump operation time, reaches effects of energy saving and emission reduction.
Description
Technical field
The present invention relates to a kind of lithium battery cavity negative pressure formation method and devices.
Background technique
Lithium battery has the advantages that high-energy, small in size, light-weight, specific energy is high, the good, flexible design of safety etc. is a variety of,
It is widely used in new-energy automobile, moves in number class product.The lithium battery of part of specification, such as square shell lithium battery, part
Cylindrical lithium battery etc. needs that negative pressure technique is added in formation process, avoids bulging, size modification.
Therefore negative pressure chemical conversion is a highly important step in cell production process.In formation process, battery will be formed
SEI film.And this SEI film will affect the internal resistance of finished battery, capacity, cycle life, self discharge level, maximum discharge current
Equal multiple parameters.And the formation of SEI film is a kind of irreversible state, therefore the superiority and inferiority of negative pressure chemical synthesis technology is not only to be
Guarantee that the gas generated in battery forming process is sucked out, to avoid battery core oxygen blast cyanidation, tab compactness be deteriorated etc. physics because
Element；Also determine compactness, uniformity and the consistency of the formation of SEI film.Therefore good negative pressure system is that lithium battery produced
It is highly important in journey.
With the development of lithium battery industry, the lithium battery of various models all has the market demand.Therefore will appear equipment needs
It is compatible with the requirement of production multiclass lithium battery product.For each model lithium battery, often there is difference in fluid injection hole location.Therefore previous
It is melted into using the negative pressure of suction nozzle mode, there are hole locations to fix, and adjusts cumbersome disadvantage.There is also suction nozzles directly to connect with battery simultaneously
The problem of touching, suction nozzle generate electrolyte crystallization, leakproofness are caused to be deteriorated, and vacuum effect declines.
Summary of the invention
The object of the present invention is to provide lithium battery cavity negative pressure forming technologies, can be realized the whole negative pressure technique of battery core,
Solve the problems, such as that battery specifications result in liquid injection hole and are difficult to be directed at negative pressure hole.The negative pressure circuit of the single battery core of battery core is avoided simultaneously
The phenomenon that leaking, whole negative pressure caused to be collapsed.In addition it can play the monitoring of battery compartment environment, control, isolation disappear
Anti- effect.
Lithium battery cavity negative pressure formation method of the present invention, comprising the following steps:
1) lithium battery that fluid injection is completed is put into inside pallet, and keeps the upper and lower edge of pallet outline border and upper and lower needle plate close
Sealing-in touching；Pallet outline border is sealing electrolyte resistance corrosion material, and outline border edge and needle plate component touch position are equipped with seal groove,
Cooperate when cylinder is closed with the sealing strip at needle plate, plays dual sealing functions；The dismountable interior village of pallet is resistant material,
Convenient for cleaning the replacement with battery specifications, and play certain constraint and guiding role；
2) sealed environment is formed, airtight test:
Pallet outline border and upper and lower needle plate are pushed in the drive for driving cylinder closely to be sealed, so that entire pallet generation one close
Chamber is sealed, while battery is contacted with the probe on needle plate；
Adjustment sealing cavity pressure makes its interior negative pressure value rise to setting value, and carries out air-tightness survey to the seal chamber of pallet
Try the air-tightness to guarantee seal chamber；
3) it charges, negative pressure chemical conversion:
After air-leakage test, start to carry out the lithium battery being placed in pallet formation charging process, while starting negative
Press process；
4) control of negative pressure value:
In formation process, the negative pressure value in seal chamber is monitored and adjusted in real time, so that negative pressure value keeps stablizing；
5) breaking vacuum:
After formation charging process or when abnormal alarm, the inert gases such as nitrogen or atmosphere are injected into seal chamber with broken
Except the vacuum state of seal chamber；
4) it discharges:
After the completion of negative pressure chemical conversion, pallet leaves from warehouse compartment, completes negative pressure chemical conversion.
Further, the air tightness test in step 2) the following steps are included:
1. adjustment sealing cavity pressure, makes its interior negative pressure value rise to setting value, wherein setting value is -90kps；
2. after stablizing setting time under the negative pressure value of setting, measuring closed environment negative pressure value, the reality of negative pressure value again
Value is greater than negative pressure setting value 10kps or more, can assert that air-tightness is good；Otherwise air-tightness is bad.
The setting value of negative pressure value is -90kps, setting time 60s.
The device of lithium battery cavity negative pressure formation method building according to the present invention, it is characterised in that: including support
Device, needle plate component, driving cylinder, pallet and control device,
The support device includes support plate, support guide rod and sliding block, and the support plate, which is equipped with, to be passed through for probe to connect
The hole of battery electrode is touched, the more support guide rods vertical and rotationally connected with support plate are installed in the support plate；It is described
Be spirally connected sliding block in support guide rod, and the sliding block is fixedly mounted on the supporting plate, can be in support guide rod axial direction in the case where driving cylinder drives
Lower movement is to adjust the distance between needle plate component；
The needle plate component is two sets, respectively upper needle plate component and knit stitch board group part, and upper needle plate component is mounted on
The top of support guide rod, knit stitch board group part are packed in the underface of support plate, in holding needle plate component, knit stitch board group part with branch
Fagging is parallel, and upper needle plate component inner face, knit stitch board group part inner face are covered with the probe for contacting with battery electrode, and upper needle
The inner face of board group part, the inner face difference of the knit stitch board group part are positioned opposite, for close with the upper and lower EDGE CONTACT of pallet
Envelope；The driving cylinder setting on the supporting plate, and drives the output shaft of cylinder to be connected by transmission component with support guide rod,
To drive support guide rod to rotate；The plate body of at least a set of needle plate component is equipped with the ventilation for being connected to external air source
Hole and negative pressure hole for being connected to vacuum pump, wherein negative pressure hole is used to extract the gas in seal chamber with the shape in seal chamber
At vacuum environment, venthole is for abolishing vacuum environment in seal chamber；
The pallet includes pallet outline border and pallet liner, the pallet outline border and the pallet liner being placed in pallet outline border
It is detachably connected with, the upper and lower edge of pallet outline border with upper needle plate component, knit stitch plate component touch circumferentially arranged with for sealing
Seal groove；Pallet liner end face is equipped with several for placing the card slot of lithium battery；Wherein upper needle plate component, knit stitch board group
When part compresses pallet outline border upper and lower edge, three surrounds a seal chamber for placing battery；
The control device includes controller, man machine operation interface and B/P EGR Back Pressure Transducer EGR, the B/P EGR Back Pressure Transducer EGR setting
On the pipeline being connected with negative pressure hole, the signal input part of the controller is connect with the man machine operation interface signal, described
The signal output end of controller and the signal of the control terminal for driving cylinder, the control terminal of vacuum pump and B/P EGR Back Pressure Transducer EGR are defeated
Outlet electrical connection.
Further, the plate body of the needle plate component is equipped with the temperature sensor for detecting sealing cavity temperature, wherein
The signal output end of temperature sensor is electrically connected with the signal input part of the controller.
Further, the inner face edge of the needle plate component is circumferentially embedded in for matching with the seal groove at pallet outline border edge
The sealing strip of conjunction, for realizing the sealing between needle plate component inner face edge and tray edge.
Further, the plate body of the needle plate component is equipped with the fire-fighting spraying mouth that can be connected to extraneous spray equipment, is used for
Into seal chamber, spraying cooling liquid is to cool down to seal chamber.
Further, solenoid valve and throttle valve, and the control terminal of solenoid valve are equipped on the connected pipeline of the negative pressure hole
It is electrically connected with the signal output end of the controller, for controlling the negative pressure value in seal chamber.
Beneficial effects of the present invention:
(1) it can be widely used in the negative pressure chemical conversion of various specifications battery core, be not necessarily to change because of battery core specification, or can not be aligned
Liquid injection hole leads to not carry out negative pressure chemical conversion or technique requirement is not achieved in vacuum effect；
(2) negative pressure hole does not contact directly with battery, avoids electrolyte crystallization that leakproofness is caused to decline, and reduces negative pressure pump and opens
Time reaches effects of energy saving and emission reduction；
(3) negative pressure value can be monitored and be controlled.Negative pressure value can be adjusted in the different chemical conversion stages；
(4) cleaning replacement negative pressure suction nozzle, collection cups and bus system are not necessarily to.Pallet and needle plate component can be extracted out integrally
It is cleaned, saves human resources；
(5) it is firm corrosion-resistant that outer lining design, outer lining in pallet are sealed.Interior village is corrosion-resistant and detachable, for converting battery core
Specification plays the role of guiding, constraint battery core；
(6) negative pressure component count is reduced, a set of electrolyte is equipped with from every battery core and caches collection cups, become a pallet and match
Standby a set of electrolyte caches collection cups, save the cost；
(7) equal pallets electricity will not be removed because of certain battery core liquid injection hole and negative pressure mouth deflection, the unqualified battery core of pallet internal cause
The factor of core lazy weight causes entire negative pressure system effect to decline；
(8) enclosed cell storehouse environment can play isolation external environment interference；
(9) play the role of closed fire-fighting, fire-fighting spraying fire extinguishing can be carried out at the first time again, disaster is avoided to spread.
Detailed description of the invention
Fig. 1 a is main view of the invention.
Fig. 1 b is side view of the invention.
Fig. 1 c is top view of the invention.
Fig. 1 d is the A-A cross-sectional view of Fig. 1 c.
Fig. 2 a is support holder structure figure of the invention.
Fig. 2 b is pallet side view of the invention.
Fig. 2 c is the A-A cross-sectional view of Fig. 2 b.
Fig. 3 a is upper needle plate component main view of the invention.
Fig. 3 b is upper needle plate assembly plan view of the invention.
Fig. 3 c is upper needle plate component front view of the invention.
Fig. 3 d is upper needle plate component side view of the invention.
Fig. 4 a is knit stitch board group part main view of the invention.
Fig. 4 b is knit stitch plate assembly plan view of the invention.
Fig. 4 c is knit stitch plate component front view of the invention.
Fig. 4 d is knit stitch board group part side view of the invention.
Fig. 5 is vacuum cavitations logical schematic.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawing
Referring to attached drawing:
The lithium battery cavity negative pressure formation method of the present invention of embodiment 1, comprising the following steps:
1) lithium battery that fluid injection is completed is put into inside pallet, and keeps the upper and lower edge of pallet outline border and upper and lower needle plate close
Sealing-in touching；Pallet outline border is sealing electrolyte resistance corrosion material, and outline border edge and needle plate component touch position are equipped with seal groove,
Cooperate when cylinder is closed with the sealing strip at needle plate, plays dual sealing functions；The dismountable interior village of pallet is resistant material,
Convenient for cleaning the replacement with battery specifications, and play certain constraint and guiding role；
2) sealed environment is formed, airtight test:
Pallet outline border and upper and lower needle plate are pushed in the drive for driving cylinder closely to be sealed, so that entire pallet generation one close
Chamber is sealed, while battery is contacted with the probe on needle plate；
Adjustment sealing cavity pressure makes its interior negative pressure value rise to setting value, and carries out air-tightness survey to the seal chamber of pallet
Try the air-tightness to guarantee seal chamber；
3) it charges, negative pressure chemical conversion:
After air-leakage test, start to carry out the lithium battery being placed in pallet formation charging process, while starting negative
Press process；
4) control of negative pressure value:
In formation process, the negative pressure value in seal chamber is monitored and adjusted in real time, so that negative pressure value keeps stablizing；
5) breaking vacuum:
After formation charging process or when abnormal alarm, the inert gases such as nitrogen or atmosphere are injected into seal chamber with broken
Except the vacuum state of seal chamber；
6) it discharges:
After the completion of negative pressure chemical conversion, pallet leaves from warehouse compartment, completes negative pressure chemical conversion.
Further, the air tightness test in step 2) the following steps are included:
1. adjustment sealing cavity pressure, makes its interior negative pressure value rise to setting value, wherein setting value is -90kps；
2. after stablizing setting time under the negative pressure value of setting, measuring closed environment negative pressure value, the reality of negative pressure value again
Value is maintained at -80kps or more, can assert that air-tightness is good；Otherwise air-tightness is bad；Setting time is 60s.
The device that embodiment 2 is constructed according to lithium battery cavity negative pressure formation method described in embodiment 1, including support device
1, needle plate component 2, driving cylinder 3, pallet 4 and control device,
The support device 1 includes support plate 11, support guide rod 12 and sliding block 13, and the support plate 11 is equipped with for probe
Across the hole to contact 5 electrode of battery, the more branch vertical and rotationally connected with support plate are installed in the support plate 11
Support guide rod 12；Be spirally connected sliding block 13 in the support guide rod 12, and the sliding block 13 is packed in support plate 12, in driving 3 band of cylinder
It can axially move up and down under dynamic along support guide rod 12 to adjust the distance between needle plate component；
The needle plate component 2 is two sets, respectively upper needle plate component 21 and knit stitch board group part 22, and upper needle plate component 21
Be mounted on the top of support guide rod 12, knit stitch board group part 22 is packed in the underface of support plate 11, needle plate component 21 in holding, under
Needle plate component 22 is parallel with support plate 11, upper 21 inner face of needle plate component, 22 inner face of knit stitch board group part be covered with for electricity
The probe of 5 electrode of pond contact, and the inner face of the inner face of upper needle plate component 21, the knit stitch board group part 22 is respectively with respect to cloth
It sets, for being sealed with the upper and lower EDGE CONTACT of pallet 4；The driving cylinder 3 is arranged in support plate 11, and drives cylinder 3
Output shaft is connected by transmission component with support guide rod, to drive support guide rod 12 to rotate；At least a set of needle plate component 2
Plate body be equipped with the venthole 23 for being connected to external air source and the negative pressure hole for being connected to vacuum pump 24, wherein bearing
Pressure hole 24 is used to extract the gas in seal chamber to form vacuum environment in seal chamber, and venthole 23 is for abolishing in seal chamber
Vacuum environment；The pallet 4 includes pallet outline border 41 and pallet liner 42, the pallet outline border 41 be placed in pallet outline border
Pallet liner 42 is detachably connected with, and the upper and lower edge of pallet outline border 41 is circumferentially arranged with being used for and upper needle plate component, knit stitch board group
The seal groove 411 of part contact sealing；42 end face of pallet liner is equipped with several for placing the card slot of lithium battery；On wherein
When needle plate component 21, knit stitch board group part 22 compress 41 upper and lower edge of pallet outline border, three surrounds a sealing for placing battery
Chamber；
The control device includes controller, man machine operation interface and B/P EGR Back Pressure Transducer EGR, the B/P EGR Back Pressure Transducer EGR setting
On the pipeline being connected with negative pressure hole, the signal input part of the controller is connect with the man machine operation interface signal, described
The signal output end of controller and the signal of the control terminal for driving cylinder, the control terminal of vacuum pump and B/P EGR Back Pressure Transducer EGR are defeated
Outlet electrical connection.
Further, the plate body of the needle plate component 2 is equipped with the temperature sensor 25 for detecting sealing cavity temperature,
The signal output end of middle temperature sensor 25 is electrically connected with the signal input part of the controller.
Further, the inner face edge of the needle plate component 2 is circumferentially embedded in for the seal groove with pallet outline border edge
The sealing strip 26 of 411 cooperations, for realizing the sealing between needle plate component inner face edge and tray edge.
Further, the plate body of the needle plate component 2 is equipped with the fire-fighting spraying mouth 27 that can be connected to extraneous spray equipment, uses
In into seal chamber spraying cooling liquid to cool down to seal chamber.
Further, solenoid valve and throttle valve, and the control of solenoid valve are equipped on the connected pipeline of the negative pressure hole 24
End is electrically connected with the signal output end of the controller, for controlling the negative pressure value in seal chamber.
Specifically, Fig. 1 is cavity schematic diagram, and after cylinder movement is closed, upper needle plate component, pallet and knit stitch board group part,
Three components closure；Sealing function is played by the sealing ring in Fig. 3 in gap, to form an airtight cavity.It is completed at the same time upper and lower
Probe on needle plate component is contacted with battery.
Pallet in Fig. 2 is divided into including village in pallet outline border and dismountable pallet, for placing a certain number of electricity
Pond.Pallet liner is replaceable, for adapting to the battery core of different size, and plays certain guiding, effect of contraction.
Needle plate component can be with integral demounting in Fig. 3: the inner face of plate body is covered with probe, and installation site is determined by battery specifications
It is fixed.Plate body edge embedded sealing ring forms seal cavity for contacting with pallet outline border；Plate body is equipped with temperature sensor, uses
Cavity temperature is sealed in detection；Negative pressure hole on plate body, for controlling the negative pressure value in seal chamber；Fire-fighting spraying on plate body
Mouthful, for reducing the temperature in seal chamber, and plate body can open inwards into nitrogen by breaking vacuum hole, abolish the true of seal chamber
Altitude.
In chemical conversion process, negative pressure hole connects negative pressure line, and inside cavity gas is extracted out, negative pressure state is formed it into,
To guarantee that battery carries out negative pressure chemical conversion.After formation charging process or before needing to open cylinder, breaking vacuum hole will be into
The operation of row breaking vacuum, makes inside cavity restore normal barometric pressure, then open cylinder.
It will be operated by spray equipment when occurring the battery core combustion position of battery in charging flow after temperature sensor confirmation,
Processing is dangerous in time.It also can be artificial in the diffusion of first time control disaster since there are the packages of needle plate, pallet outline border
Time enough is striven in processing.
Embodiment 3 is in terms of vacuum cavitations, using control unit used in Fig. 5.Its vacuum cavitations process:
1) according to negative pressure process, negative pressure value is issued, when negative pressure is greater than the set value 10kps, closing negative pressure valve；When negative pressure is less than
Setting value 10kps opens negative pressure valve, and negative pressure value slowly rises under the valve action that throttles；
2) negative pressure value is changed according to battery average voltage；Because battery core is in chemical conversion different phase, gaseous species, the body of generation
Product is all different；The stage condition of chemical conversion is assessed by the average voltage of the collected pallet battery core, to be automatically regulated to be
Corresponding negative pressure setting value；
3) negative pressure setting is carried out according to flow time；It is in different time periods to set according to the standard curve of chemical conversion battery core
Negative pressure value.
Since inside cavity is in low vacuum state, three kinds of modes of heat transmitting: hot transmitting, thermal convection, heat radiation are only deposited
In heat radiation.Therefore in order to reach the heat dissipation effect of battery, nitrogen can be opened after temperature sensor detection reaches heat dissipation threshold value
Air valve slowly enters cavity under the action of throttle valve, under the situation for not destroying vacuum degree, forms gaseous exchange heat dissipation.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention also includes art technology
Personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (8)
1. lithium battery cavity negative pressure formation method, comprising the following steps:
1) lithium battery that fluid injection is completed is put into inside pallet, and keeps the upper and lower edge of pallet outline border to seal with upper and lower needle plate and connects
Touching；
2) sealed environment is formed, airtight test:
Pallet outline border and upper and lower needle plate are pushed in the drive of driving cylinder closely to be sealed, so that entire pallet generates a seal chamber,
Battery is contacted with the probe on needle plate simultaneously；
Adjustment sealing cavity pressure, makes its interior negative pressure value rise to setting value, and to the seal chamber of pallet carry out air tightness test with
Guarantee the air-tightness of seal chamber；
3) it charges, negative pressure chemical conversion:
After air-leakage test, start to carry out formation charging process to the lithium battery being placed in pallet, while starting vacuum flow
Journey；
4) control of negative pressure value:
In formation process, the negative pressure value in seal chamber is monitored and adjusted in real time, so that negative pressure value keeps stablizing；
5) breaking vacuum:
After formation charging process or when abnormal alarm, the inert gases such as nitrogen are injected into seal chamber or atmosphere is close to abolish
Seal the vacuum state of chamber；
4) it discharges:
After the completion of negative pressure chemical conversion, pallet leaves from warehouse compartment, completes negative pressure chemical conversion.
2. lithium battery cavity negative pressure formation method as described in claim 1, it is characterised in that: the air-tightness in step 2)
Test the following steps are included:
1. adjustment sealing cavity pressure, makes its interior negative pressure value rise to setting value, wherein setting value is -90kps；
2. after stablizing setting time under the negative pressure value of setting, measuring closed environment negative pressure value again, the actual value of negative pressure value is big
In negative pressure setting value 10kps or more, it can assert that air-tightness is good；Otherwise air-tightness is bad.
3. lithium battery cavity negative pressure formation method as claimed in claim 2, it is characterised in that: step 2. in: negative pressure setting
Value is -90kps；Setting time is 60s.
4. the device of lithium battery cavity negative pressure formation method building according to any one of claims 1 to 3, feature exist
In: including support device, needle plate component, cylinder, pallet and control device are driven,
The support device includes support plate, support guide rod and sliding block, and the support plate, which is equipped with, to be passed through for probe to contact electricity
The more support guide rods vertical and rotationally connected with support plate are installed in the support plate in the hole of pond electrode；The support
Be spirally connected sliding block on guide rod, and the sliding block is fixedly mounted on the supporting plate, can move down in support guide rod axial direction in the case where driving cylinder drives
It moves to adjust the distance between needle plate component；
The needle plate component is two sets, respectively upper needle plate component and knit stitch board group part, and upper needle plate component is mounted on support
The top of guide rod, knit stitch board group part are packed in the underface of support plate, and needle plate component, knit stitch board group part be and support plate in holding
In parallel, upper needle plate component inner face, knit stitch board group part inner face are covered with the probe for contacting with battery electrode, and upper needle plate group
The inner face of part, the inner face difference of the knit stitch board group part are positioned opposite, for sealing with the upper and lower EDGE CONTACT of pallet；Institute
It states the setting of driving cylinder on the supporting plate, and the output shaft of cylinder is driven to be connected by transmission component with support guide rod, to drive
Dynamic support guide rod rotation；The plate body of at least a set of needle plate component be equipped with venthole for being connected to external air source with
And the negative pressure hole for being connected to vacuum pump, wherein it is true to be formed in seal chamber to be used to extract the gas in seal chamber for negative pressure hole
Altitude, venthole is for abolishing vacuum environment in seal chamber；The pallet includes pallet outline border and pallet liner, the pallet
Outline border is detachably connected with the pallet liner being placed in pallet outline border, the upper and lower edge of pallet outline border circumferentially arranged with for
The seal groove that upper needle plate component, knit stitch plate component touch seal；Pallet liner end face is equipped with several for placing lithium electricity
The card slot in pond；When wherein upper needle plate component, knit stitch board group part compress pallet outline border upper and lower edge, three surrounds one for placing
The seal chamber of battery；
The control device includes controller, man machine operation interface and B/P EGR Back Pressure Transducer EGR, the B/P EGR Back Pressure Transducer EGR setting with
On the connected pipeline of negative pressure hole, the signal input part of the controller is connect with the man machine operation interface signal, the control
The signal output end of the control terminal of the signal output end of device and the driving cylinder, the control terminal of vacuum pump and B/P EGR Back Pressure Transducer EGR
Electrical connection.
5. device according to claim 4, it is characterised in that: the plate body of the needle plate component is equipped with for detecting sealing
The temperature sensor of cavity temperature, wherein the signal output end of temperature sensor and the signal input part of the controller are electrically connected
It connects.
6. device according to claim 4, it is characterised in that: the inner face edge of the needle plate component is circumferentially embedded in and uses
In the sealing strip with the cooperation of the seal groove at pallet outline border edge, for realizing between needle plate component inner face edge and tray edge
Sealing.
7. device according to claim 4, it is characterised in that: the plate body of the needle plate component, which is equipped with, to be sprayed with the external world
Device connection fire-fighting spraying mouth, for into seal chamber spraying cooling liquid to cool down to seal chamber.
8. device according to claim 4, it is characterised in that: be equipped on the connected pipeline of the negative pressure hole solenoid valve and
Throttle valve, and the control terminal of solenoid valve is electrically connected with the signal output end of the controller, it is negative in seal chamber for controlling
Pressure value.
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| CN201811329052.8A CN109449495B (en) | 2018-11-09 | 2018-11-09 | Negative pressure formation method and device for lithium battery cavity |
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| CN113447218A (en) * | 2021-09-01 | 2021-09-28 | 苏州华智诚精工科技有限公司 | Battery leakage detection method, structure and system |
| CN117848602A (en) * | 2023-12-31 | 2024-04-09 | 同技智能装备(嘉兴)有限公司 | New energy automobile battery tray is with leakproofness detection equipment |
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